Process for the manufacture of glue, gelatin, and the like.



UNITED STATES PATENT OFFICE.

, ALOIS 116W, 0! VIENNA, AUSTRIA-HUNGARY, AND ERNST FISCHER, OFQCHABLOTTEN- none, GERMANY. 1 g

rnoonss son rim manuracruan or own, GELATIN,-AN D ran 1.11m

1,086,149. 7N0 Drawing.

Specification of Letters Patent. I 4 Application filed January 16, 1912, swarm. 671,455.

To all whom it'may concern:

Be it known that we, Anors Low, manufacturer, resident of Vienna, Austria-Hungory, and Dr. Ennsr Frsomm, chemist, resident of Charlottenburg, near Berlin, Germany, both subjects of the Emperor ofAus- V A further object of our invention is to provide an improved process for producing glue from bones, which revents all dan er of deterioration of the g ue by the splittmg up or decomposition of its constituents.

At present, glue is extracted from bone in successive stages by treating the bone with steam for several hours; the steam pressure being gradually raised from approximately one atmosphere in thefirst stage to approximately two and one-half atmospheres 1n the last stage. In this process, the protein compounds of the bone are split up or decomposed into less complex substances to form glue, probably by a hydrolytic reaction, and the constituents of the glue formed early in the process are in turn split up by .the continuation of the heat in the steaming treatment; thereby causing material deterioration and loss of the glue..

In our improved process, the bones are treated with steam under a pressure of two and one-half atmospheres to three atmos- 1pheres for a period of from ten minutes to fteen minutes. This'causes a rapid conversion of the protein compounds of the bone into a high grade glue. The hotsteamedbones from the previoustreatmentare then subjected to a vacuum to cause a rapid evaporation of the hot condensed steam which has permeated the bones in the previous ,step; thereb quickly cooling the bones terioration of the glue by the splitting up of throughout t eir entire .mass to 'revent deence of. a vacuum to supply suflicient hot water of condensation for thoroughly dissolvmg the glue and removing the ,latter from the bones. While this is our preferred method for removing the glue, it could ohits constituents. The cooled-bones are then treated with low pressure steam in the pres-' Patented Fab. '3, 1914.

viously be removed by any ofthe well known methods.

By our above described improved method, We prevent all danger of deterioration or splitting up of the glue, and insure the production of a much greater quantity of high grade glue than is extractable from bones by previous methods, 5

We claim 1. The herein describe ducing glue from bone, w ich consists in treating bone with steam at a pressure of two and one-half to three atmospheres for a -period not exceeding fifteen minutes to rapidly convert the protein compounds of the bone into. glue, and then s 'bjecting the hot steamed bone to a vacuum 0 produce a quick cooling throughout the entireimass of the bone by causing a rapid evaporation of a portion of, and a'cooling within the bones of the remainder of the hotcondensed steam ducing glue from bone, w

substantially two and a half atmospheres for a period not greater than fifteen. minutes,

ich consists in treating the bone with steam'at a pressure of a 'rocess for prothen subjecting the hotsteamed bone to a I vacuum for rapidly cooling the bone, simultaneously treating the cooled bone with low ressure steam in the presence of a vacuum or supplyin sufiicient condensed steam to thoroulghlty) issolve and remove the glue e on from t e.

. In testimony, that we claim the foregoing as our invention, we have signed our names in-presence of two witnesses, this. second day Fnramuolr MfissaN,

Hnmnrcn ADAM.

on. anus'r FISCHER- 

